The ABINIT Users Mailing List ( CLOSED )

[Valerio Olevano <valerio.olevano@polytechnique.fr>]

I hope someone else is going to tell you
what is a g-shell.
however in the abinit log file of the calculation
generating your KSS file, you should find something like
 Shells found:
 number of shell    number of G vectors      cut-off energy
               1                      1               0.000
               2                      9               0.567
               3                     15               0.756
               4                     27               1.513
               5                     51               2.080
               6                     59               2.269
               7                     65               3.026
               8                     89               3.593
               9                    113               3.782
              10                    137               4.538
              11                    145               5.106
              12                    169               5.106
              13                    181               6.051
(probably it's better to read this in a log for a calculation
done with all the symmetries. but then ALWAYS use the KSS with nsym=1)
then you are not allowed to use in your GW calculation for
npwwfn npw...
values which are different from the numbers of G vectors who close
a shell (the second column).
sorry, I know already very well that to make other people
use a code, we should write books of manuals, but 
you can imagine we haven't the time.

V. Olevano